I'll do my best to retrace my steps
First I looked in these forums for a case similar to mine.
I used ASWMBR to scan and it deleted some files :
c:\windows\system32\consrv.dll
C:\Windows\assembly\GAC_64\Desktop.in
C:\Windows\assembly\GAC_32\Desktop.ini
Combofix did the same.
Then I ran MBAM, which found files in my temp folder. (dont remember sorry )
After that I wanted to reboot and saw in a flash that Windows update was installing 2 updates.
After that I saw ( very quickly ) something about registry, windows rebooted and now I got this problem with the %hs thingy.
only recovery point i got is from the windows update, but when I try to restore that, it wont work.